#include <iostream>
#include <string>
#include <cstring>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>

#include "Protocol.hpp"  // 形成约定

// ./client_tcp server_ip server_port
int main(int argc, char *argv[])
{
    if(argc != 3)
    {
        std::cout << "Usage:./client_tcp server_ip server_port" <<std::endl;
        return 1;
    }

    std::string server_ip = argv[1];
    int server_port = std::stoi(argv[2]);
    int sockfd = ::socket(AF_INET, SOCK_STREAM, 0);
    if(sockfd < 0)
    {
        std::cout << "create socket failed" <<std::endl;
        return 2;
    }

    struct sockaddr_in server_addr;
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(server_port);
    server_addr.sin_addr.s_addr = inet_addr(server_ip.c_str());

    // client 不需要进行bind，tcp是面向连接的,connect 底层会自动连接
    int n = ::connect(sockfd, (struct sockaddr*)(&server_addr), sizeof(server_addr));

    // echo client 
    std::string message;
    while (true)
    {
        int x,y;
        char oper;
        std::cout << "input x: ";
        std::cin >> x;
        std::cout << "input y: ";
        std::cin >> y;
        std::cout << "input oper: ";
        std::cin >> oper;

        Request req(x,y,oper);

        // 1.序列化
        req.Serialize(message);

        // 2.Encode
        Encode(message);

        // 3.发送
        n = write(sockfd, message.c_str(), message.size());
        if(n > 0)
        {
            char inbuffer[1024];
            // 4. 获得应答
            int m = ::read(sockfd, inbuffer, sizeof(inbuffer));
            if (m > 0)
            {
                inbuffer[m] = 0;
                std::string package = inbuffer;
                std::string content;

                // 5. 读到应答完整， decode
                Decode(package, &content);

                // 6.反序列化
                Response resp;
                resp.Deserialize(content);

                // 7.得到结构化数据
                std::cout << "Result: " << resp.Result() << "[" << resp.Code() << "]" << std::endl;
            }
            else
                break;
        }
        else
            break;
    }

    
    ::close(sockfd);
    return 0;
}
